Records the Asset Bridge phase 0 spike (§16) against v8.md, and closes the
last open decision.
§4's choice to call ServUO's vendored `Ultima` STANDS: nothing faulted on a
path this protocol calls, and §9's cliloc reader reproduced UOFiddler's
123,490-entry table byte for byte in 218 ms from inside the shard.
But the spike was looking for the wrong kind of failure. `LoadStatic` and
`LoadLand` decode out of a buffer that is reused, only ever grown, and
filled by a `Read` whose return value is discarded — so a short, absent or
out-of-bounds record does not throw, it renders the PREVIOUS asset. On the
stock, unmodified client on this machine that is 22,102 ids whose index
entry reads `lookup 0, length 0`, all of which the library returns a picture
for. §1.1's "32,766 decoded" was counting these.
New §4.5 states the rule that answers it — validate before calling — with
the six checks phase 0 implemented, the eight deliberate defects they caught
(seven of which the library rendered silently, including a verdata lookup
past verdata.mul's own end, which `Verdata.Seek` bounds-checks nowhere), and
the number that makes the boundary defensible: zero false refusals across
49,151 statics and 16,384 land tiles on a clean client.
New §4.6: `FileIndex`'s UOP constructor ends `MulPath = uopPath`, so
`artLegacyMUL.uop` wins outright and `art.mul` is never opened on a current
client. Bounding an offset against the wrong file is not approximate, it is
meaningless — the spike's first run refused 34,299 good statics that way,
and every refusal read like a real finding.
New §4.7: `Ultima.Gumps.GetGump(2)`, called once from inside a running
shard, made the ServUO process disappear — no catch reached, no console
line, the probe's checkpoint file the only record. §4.1's rule is earned.
§17 now has nothing open:
* item 4 — the default audience — SETTLED: an asset inherits the audience
of the page that uses it.
* item 5 is new: validate-before-calling, chosen ahead of the spike over
a child-process extractor and over reversing §4, and confirmed by it.
The dangerous failure turns out to be a wrong picture, which no
containment strategy would have caught.
§16 marks phase 0 done and adds the half it deliberately left unbuilt to
phase 1: the animation path has no validator, and the patched client's wolf
decoded something else in silence to prove it.
Full measurements and the rig recipe live in servuo-plugins
`tools/scaffolding/README.md`; the code is RunicGateway/servuo-plugins#27.
- [x] AI-assisted — Claude Code (Opus 5)
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016wDDVXWMDz82WqE1i969r4
